About this Abstract |
| Meeting |
TMS Specialty Congress 2026
|
| Symposium
|
4th World Congress on High Entropy Alloys (HEA 2026)
|
| Presentation Title |
Element-Specific Magnetic Behavior in FeCrMnCoNi, CrCoNi and MnCoNi Multi Principal Element Alloy Thin Films |
| Author(s) |
Nushrat Naushin, Steven Nguyen, Willie B Beeson, Emma O Bernard, Meera Madhavi, CunShuo Li, Zhengxin Xie, Pooja C Rao, Alpha T N'Diaye, Kai Liu, Roopali Kukreja |
| On-Site Speaker (Planned) |
Roopali Kukreja |
| Abstract Scope |
Multi-principal element alloys (MPEAs) exhibit exceptional mechanical performance and complex magnetic behavior. First-principles calculations suggest that magnetic interactions in 3d transition-metal MPEAs are closely linked to local atomic ordering. In this study, we investigate how elemental composition governs element-specific magnetism in equiatomic FeCrMnCoNi, CrCoNi, MnCoNi, and in non-equiatomic MnₓCoᵧNiᵧ (x = 0.25, 0.40; y = 0.375, 0.30) thin films. Using X-ray magnetic circular dichroism, we find that Fe, Mn, Co, and Ni moments align parallel, while Cr aligns antiparallel. With increasing Mn content, MnCoNi thin films transition from predominantly ferromagnetic (25 at% Mn) to mixed spin-glass+ferrimagnetic, and ultimately to ferrimagnetic behavior (40 at% Mn). While Mn, Co, and Ni moments remain parallel, their magnitudes decrease by almost a factor of three with increasing Mn content. The emergence of spin-glass and ferrimagnetic states is likely driven by antiparallel Mn moments, demonstrating the strong sensitivity of element-specific magnetism to local atomic environments. |
| Proceedings Inclusion? |
Undecided |